Dipper



Patented Feb. 6, 1923.

ARTHUR WHITCRAFT, F BUCYRUS, OHO.

DIPPER.

Application filed July 6, 1922. Serial No. 573,103.

To all whom. it may con/remi.:

Be it known that I, ARTHUR lVHrrcnArT, `a citizen of the United States,and a resident of Bucyrus, Ohio, have invented an Improvement inDippers, of which the following description, in connection with theaccompanying drawings, is a specification, like letters on the drawingsrepresenting like parts. l A

My present invention relates to excavating and dredging machinery, andmore particularly to an improved dipper therefor.

The average dipper used in excavating and dredging machinery being builtof a plurality of plates riveted together and being subjected totremendous stresses and strains, in a very short time becomes uselessbecause of the wear of the rivets or the lshearing oif of such rivets.Such clippers are being continuously repaired and, as it has heretoforebeen impossible to remove the cause of wear, that is, ets holding theelements of the dipper together, the item of upkeep' has beenexceedingly high when compared with the initial cost of the dipper. Bymy present invention, I propose to build a dipper in which the bodyportion is made up of a front and a back section, each formed fromcastinetal, preferably cast manganese steel and with two interlockingand connecting Side plates or sections so designed as to better join thefront and back together and eliminate the usual repairs heretoforenecessary. In my 35 invention, when the dipper is lifted by means of asuital'ile bale or from the back or other connection attached to thebody portion, the strains are distributed uniformly through the frontsection of the dipper. In this connection the location of the bale pinhole with relation to the rivets in the side.

lates of the body portion and the design of the side plates` themselvesform an improved joint that prevents rivet shearing and, therefore, thenecessity of frequent and extensive repairs. This construction preventsdistortion taking place between the front and rear portions of the bodysuch as occurs in the usual construction of such dippers, and thestrains digging are distributed and absorbed by the plate.

The. principal object of my invention, therefore, is an improved clipperfor excavating and dredging machiner Another object is an improved formof the strain on the r1vdue to lifting when side plate whereby a betterconnection between the front and back of the dipper is obtained andshearing of the rivets that hold the various parts together isirevented.

Other objects and novel eatures of the construction and arrangement ofparts comprising my improved structure will appear as the description ofthe invention progresses.

In the accompanying drawings:

Fig. 1 is a side view;

Fig. 2 is a plan View;

Fig. 3 vis a partial Fig. 1;

Fig. 4 is a horizontal section on the line 4-,4 of Fig. 1;

Fig. 5 is a section on the line 5-5 of Fig. 1, and

Fig.' 6 is a section on Fie. 1.

eferring to the drawings, 10 designates'v a back plate provided with aplurality of eyes 11 for attaching lifting 'devices to the frontelevation or the une 6-6 0f dlpper and with a plurality of bearmgblocks.

12 in which are rotatably mounted shafts 13 to which are securedbracketslli that carry the bottom plate 15. Abutting4 against theforward edge of the back plate 10 is a'curved front plate 16 provided oneach side on the portion adjacent the abutting edge, above referredto,.with a channel 17 in which tits a plate 18, this plate beingsecurely fastened' to the front by a plurality of rivets 19 and providedat its upper end with a bale pin" hole 20, the bale pin holes 20 of theplates 18 being in alinement with `each other, yas shoWn in Fig. 2. f

Only the upper rear edge of the front plate and. the upper front edge ofthe rear plate ahut, as may be seen in dotted lines in Fig. 1,"adthelower portion of vsuch edges are cut-away to form a substantiallyelongated rectangular'space in which fits snugly the inwardly projectingportion 21 of the side plate"22,` as shown in cross section in Fig. 4.The upper end of the side plate 22 lits snugly into a recess 23 cut in'the rear and front plates 10 and 16, respectively, as shown in Fig. 6,the front and rear plates and side platel being securely fastenedtogether by a plurality of rivets 24. That' portion of the cut awayportion 23 for the reception of the top end of the side plate 22 in therear plate 10 forms a projecting lug on such back plate, and this lugmay be of various lengths and sized according to section.

the capacity ,ot the di-` to bring a henri fl Y on the side plates. rlheforni ot tne ro t ate in advance ot the passage or channel l? is sncllas to distribute the nieta-l to malte the strains el pull ing moreunitorn'l than llas heretofore been possible throughout the body portionot this That portion Q1, ot' the side plate 22 forms a joint between thefront and bach body portions and prevents strains troni 'oeing directlyapplied to 'the rivets 2, and the shape of sach plate gives the interiorot' the dipper a smooth surface and nlalfes a conlplete connectionlle-tween. 'the various parts olf the Vclipper body.

While I have shown and described the preferred enlbodinlel'lt of lnylinvention somewhat in detail, it is to be understood that l may vary thedetails olu the arl-angrelnent and construction ol parts colllprising myimproved structure without departing,r ron'l the spirit o' theinvention.

Having thus described illy invention, what l claim as new is:

l. In an improved dipper igor excavatingland dredging lllacllinery7 thecombination of a back plate, :l ilront plate, the rear edge of the saidfront plate abutting against tlle front edge of the rear pla'e, a sideplate associated with tlle liront and back plates and securely rivetedthereto, and of said side plate extending between the, front and backplates wherebyv the rivets are freed from strain while the dipper is inuse.

2. ln an illlproved dipper for exeavatingg; and drole-ingmachinery` thecombination of a back plate, forwardly extendingn'lelllbers formed onraid back plate and at each side thereof, a curved 'front plate havingvrearwardly extending portions at eacll side thereof, the upper end o ltbe forwardly tending portions oi the back plate and the, rearwardlyextendingv portions ot.' the 'l'rollt plate abutting and' with the lowerend ot er and designed N a portionv said portions cnt away to :torni arecess. a channel l'ol'nled in the upper portion ol said forwardly andrearwardly extendingpor tions, a side plate having; its upper end formedinto said channelF and the lower cen tral interior side oli' said sideplate itolnied to tit in the said recess, a plurality of rivets forsecurin;` the side plate 'to the back and front platesA :l channel'tol-ined ill the rearwardlj,7 extendingr portions olT the front plate,and lugs ,fitting into said last nanled channel and scoured to the frontplates.

ln an inlproved dipper tor excavating' and dredging' machinery7 theb:,lnnlllination o'l" a bod)v crnnpriscd ot' bach and Jfront plateshaving tol-ward and rearward extendingV portione respectivelyY abutting.side plates riveted to the jlforwardly and rearA wardly extending'portions, a lug en the bach plate engaging the side plates to torni abearingv therefor whereby a pull on the front section during the use otthe dipper is distributed tllroug'llolvlt the front plate.

l. ln an improved dipper for excavating' and dredginn,a n'lacllinery,the combination oit liront and back sections abutting' each other7 asingle channel tornled in the top side ot' the iront and bach sections.and :l side plate fitting` into said channel and riv eted to the frontand back sections to torni an outside lock 'nearing' for the dipper.

ln an improved dipper for excavating and dredging l'l'laclline'ry, theconlbination ol lront and back sections' abutting' at their top sidesand eut away on the lower side to 'ornl afrecess, a side plate rivetedto, and scouring the iront and bach sections togetller, and an inlwlrdlyextending lnein'ber on tlle side plate itingY into said recessandforming' an inside look bearing; 'for the dlpper. v

.ln testimony whereof, 1 have signed nly naine to this specification.

ARTHUR VllltllCRllalT-.l

